Answer:
Carbon dioxide
is carried by the blood in three forms
(i) In Dissolved
State Under normal temperature and pressure, about 7% of is carried
by physical solution.
(ii)As
Carbamino Compounds binds
directly with Hb to form an unstable compound carbaminocom pounds About 23% is
transported in this form.
When is high
and is low as
in the tissues, more binding of carbon-dioxide occurs whereas, when is low
and is high as
in alveol as tissue dissociation of from
carbamino-haemoglobin takes place.
(iii) As
Bicarbonate Ions reacts
with water to form carbonic acid in
the presence of carbonic anhydrase in RBC. dissociates
into hydrogen and bicarbonate ions .
The whole
reaction proceeds as follows
The carbonic
anhydrase reaction mainly occur in RBC as it contain high concentration of
enzyme carbonic anhydrase and minute quantity of it is present in plasma too.
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